Cette leçon contient 18 diapositives, avec quiz interactif, diapositives de texte et 1 vidéo.
La durée de la leçon est: 45 min
Éléments de cette leçon
§12.1 Batteries and Cells
&
§12.2 Potential Difference
Science - TTO2
Slide 1 - Diapositive
Learning Objects §12.1
Recognise the significance of the value of the ‘emf’ of a battery.
Recall electromotive force (emf) is measured in volts.
Describe how to use a voltmeter to measure the emf of a battery or a potential difference in a circuit.
Explain the significance in terms of energy of the emf of a battery.
Slide 2 - Diapositive
Learning Objects §12.2
Explain what is meant by potential difference.
State that potential difference (pd) is measured in volts.
Describe how to use a voltmeter to measure the pd across a component in a circuit.
Explain the significance in terms of energy of the emf of a battery and a pd in a circuit.
Slide 3 - Diapositive
Charge and Current
Remember this one? -->
The Coulomb, in other words, a bag of electrons!
Slide 4 - Diapositive
Charge and Current
In the previous LessonUp you learned that if charge (electrons) starts to move, we call it an Electric Current.
You can measure the current with an Ammeter and the unit is Ampere.
I = Q / t
[A] = [C] / [s]
Slide 5 - Diapositive
Voltage / Potential Difference
In this LessonUp you will learn WHY charge moves and what it does.
Slide 6 - Diapositive
Time for a video!
Watch the video about Potential Difference on the next slide.
Slide 7 - Diapositive
Slide 8 - Vidéo
Energy
If you want the light bulb to shine, it needs to be supplied with Energy.
You can think of the coulombs (bags of electrons) as the carriers of Energy.
Slide 9 - Diapositive
The coulombs get energy from the battery and carry it to the light bulb. They give it to the light bulb and go back to the battery to fedge more energy.
Slide 10 - Diapositive
Voltage
Energy is measured in Joules
The number of Joules that each coulomb gives to a component such as the light bulb is known as 'Volts'
1 V = 1 J/C
Another word for Voltage is Potential Difference. Because we talk about the difference in Energy before and after the Coulombs gave it to a component in the circuit.
Slide 11 - Diapositive
Slide 12 - Diapositive
Time for some practice:
Read p. 164-167 (TB)
Do Summary Questions p. 164 + 166 (TB)
Do workbook exercises p. 84 + 85 (WB)
Slide 13 - Diapositive
Slide 14 - Diapositive
Homework evaluation
In the next slide, write down the homework exercises that you found most difficult. Next lesson we will take some time to answer a few of those quetions.
Slide 15 - Diapositive
Write down the number and page of the homework exercises that you found most difficult:
Slide 16 - Question ouverte
What is potential difference?
Slide 17 - Diapositive
What is potential difference?
The difference in energy per coulomb between two points